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analysis/out/findings/cheaper-twin__rm14-2-vs-rm12-5.json

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+{
+  "slug": "cheaper-twin/rm14-2-vs-rm12-5",
+  "type": "cheaper_twin",
+  "page_path": "/cheaper-twin/rm14-2-vs-rm12-5",
+  "title": "Upminster vs Hornchurch: the same semi-detached house, about 20% cheaper per m\u00b2",
+  "hook": "\u00a3115,290 less for an equivalent semi-detached house: same station, similar schools, ~2.99km apart",
+  "shocking_number": "20%",
+  "pricey": {
+    "sector": "RM14 2",
+    "name": "Upminster",
+    "label": "Upminster (RM14 2)",
+    "named": true,
+    "est_psqm": 6360,
+    "n": 3026
+  },
+  "twin": {
+    "sector": "RM12 5",
+    "name": "Hornchurch",
+    "label": "Hornchurch (RM12 5)",
+    "named": true,
+    "est_psqm": 5079,
+    "n": 3133
+  },
+  "stats": {
+    "gap_pct": 20.1,
+    "gap_per_sqm": 1281,
+    "gap_on_90sqm": 115290,
+    "gap_on_avg_home": 111447,
+    "dominant_type": "Semi-Detached",
+    "build_year": 1940,
+    "good_secondary_catchments": 3.7,
+    "station_km": 0.77,
+    "distance_km": 2.99
+  },
+  "map_query": "lat=51.54892&lon=0.22193&zoom=12.5&filter=Est.%20price%20per%20sqm:0:5300&filter=Good%2B%20secondary%20school%20catchments:1:11",
+  "map_url": "https://perfect-postcode.co.uk/?lat=51.54892&lon=0.22193&zoom=12.5&filter=Est.%20price%20per%20sqm:0:5300&filter=Good%2B%20secondary%20school%20catchments:1:11",
+  "og_image": "https://perfect-postcode.co.uk/api/screenshot?og=1&lat=51.54892&lon=0.22193&zoom=12.5&filter=Est.%20price%20per%20sqm:0:5300&filter=Good%2B%20secondary%20school%20catchments:1:11",
+  "methodology": "Postcode sectors (e.g. N10 3) compared on estimated \u00a3/m\u00b2 of floor space. A pair is only called a 'twin' when the two sectors share the dominant property type, build era (\u00b130y), good-school catchment provision, station access, deprivation/tenure, education, age and home size, so the price gap reflects a name premium, not a different kind of area. Estimates, not valuations; aggregated to sector, never address-level.",
+  "needs_name_check": false,
+  "attribution": "Contains HM Land Registry data \u00a9 Crown copyright and database right. Licensed under the Open Government Licence v3.0.",
+  "sources": "HM Land Registry \u00b7 EPC (DLUHC) \u00b7 Ofsted \u00b7 DfT \u00b7 ONS \u00b7 Police.uk"
+}